nRF24L01 +

[cthsq]

Hello! What does the real marking of the nRF24L01 + chip look like? I have not such, but very similar. The problem is that the module after a while ceases to go to sleep, and then stops working entirely!

[ovrebekk]

Hi

A real nRF24L01+ should look like this.

Unfortunately it is not very difficult to duplicate the marking of the chip, and a fake chip can't always be detected by the marking alone. 

Still, if you let me know the marking on your chip I can tell you if it's an obvious fake. 

I think the best way to find out if your problems are caused by a fake chip is to buy an nRF24L01+ module from a safe vendor (such as this one from Sparkfun) and check if it exhibits the same issues.  If it doesn't then you probably have a fake on your hands ;)

Best regards
Torbjørn

[cthsq]

The marking is similar, but the last line is different - the big distance from the point to the letter N.

[cthsq]

Read all the registers from 0x00 to 0xFF, all the same manufacturer. Register 0x1E on all chips reads 0x68?

[ovrebekk]

Hi 

I did a register readout on my own genuine module and attached the results below. Getting 0x68 on register 0x1E appears to be normal:

I also found an interesting forum thread discussing fake nRF24L01+ modules. There might be some good information there regarding the different fakes out there, and what differences you might see in performance and functionality. 

Best regards
Torbjørn

[cthsq]

I have all registers with factory settings, and you have 0 and 5 differ!

[ovrebekk]

Hi 

Which values do you read out on the differing registers?

Best regards
Torbjørn

[cthsq]

Registe 0x00 - 0x08, register 0x05 - 0x02

[ovrebekk]

Hi

Sorry about that, it seems I didn't properly reset the nRF24L01+ device before I read out the register values, and the configuration changes made in my example were left in. 

The values you list are the correct reset values. 0x08 for register 0 and 0x02 for register 5. 

Best regards
Torbjørn